diff --git a/types/is-date-object/index.d.ts b/types/is-date-object/index.d.ts
index 55865a2a2e..3ad24b15af 100644
--- a/types/is-date-object/index.d.ts
+++ b/types/is-date-object/index.d.ts
@@ -8,6 +8,7 @@ type InvalidTypes = undefined | null | boolean | string | number | [] | {};
 
 declare function isDateObject(value: Date): true;
 declare function isDateObject(value: InvalidTypes | unknown): boolean;
-declare function isDateObject(value?: unknown): boolean;
+declare function isDateObject(value?: object): boolean;
+declare function isDateObject(value?: null | undefined | boolean | string | number | symbol | bigint | Array | Function): false; 
 
 export = isDateObject;